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Hot-seal functional stretch film

A functional, film technology, applied in the field of heat-sealable unidirectional or biaxially oriented films, which can solve the problems of decreased heat-sealing properties of polyolefin materials, large directional differences in heat-sealing strength, and difficulty in stabilizing and controlling heat-sealing properties. , to achieve high economy, high mechanical properties, and the effect of solving warpage

Inactive Publication Date: 2011-09-21
江苏彩华包装集团公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a heat-sealable polyolefin stretched film with a heat-seal strength ≥ 3N / 15mm. Difficult to stabilize and control the technical problem of heat sealing performance under stretch forming conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1: A single-sided heat-sealable biaxially stretched packaging material for printing

[0069] At present, most of the biaxially oriented polyolefin films used for gravure printing in the market have no heat-sealing performance or low heat-sealing strength (general heat-sealing strength) ≤ 3N / 15mm). Composite polyolefin film. Therefore, the production process is increased, the production cost, resource cost (including raw materials, energy) and environmental cost (increased carbon emissions, solvent emissions) and the like are increased.

[0070] In this embodiment, in order to lower production costs, save resources and protect the environment, a single-side heat-sealable polyolefin stretch packaging material for printing is designed and developed.

[0071] The packaging material is a two-layer film, the structure is: PP-modified PE

[0072] in:

[0073] ①, PP chooses homopolypropylene:

[0074] ②. Modified PE is composed of polyethylene mixed with at least on...

Embodiment 2

[0081] Example 2: A double-sided heat-sealable uniaxially stretched packaging material for pillow packaging

[0082] The uniaxially oriented polyolefin film currently on the market for candy packaging can only be used for twist packaging because the material has no heat-sealing properties.

[0083] In this example, in order to meet the heat-sealing requirements of lap-sealing inside and outside of automatic pillow-type packaging, a double-sided heat-sealable polyolefin uniaxially stretched packaging material was designed and developed.

[0084] The packaging material is a single-layer or multi-layer film with a symmetrical structure, and the structure is: modified PP-PE-modified PP where:

[0085] ①, PE choose high-density polyethylene:

[0086] ②. Modified PP is composed of polypropylene mixed with at least one of the following four materials, with a density of 0.90±0.04g / cm3. See the table below for details:

[0087] change

sex

PP

Base

PP0.89...

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Abstract

The invention provides a functional stretch film with hot seal property, and in particular relates to a hot-seal unidirectional or bidirectional stretch film, which has the hot seal strength of more than or equal to 3N / 15mm and the thickness of more than or equal to 0.010mm and less than or equal to 0.150mm and which is formed by a single layer, two layers or more than two layers of polyolefine resin by an auxiliary co-mixing process and a blow molding, flow casting extrusion stretching or co-extrusion stretching process. The functional stretch film solves the technical problem that the effective hot seal cannot be achieved on an occasion with higher hot-seal requirements due to difficult obtaining of hot seal or serious hot-seal performance reduction when the polyolefin film is stretched. The product has the advantages of high mechanical strength, excellent optical property, obviously high water vapor resistance, anti-puncturing property and extremely good seal grease resistance and anti-pollution hot seal property, and can be widely applied to bags and automatic filling type sealed packages of foods, articles of daily use, cosmetics, chemicals, pesticides, military products and medical products as well as intaglio printing films and flexographic printing films, particularly various hot-seal materials under the dry-type lamination, wet-type lamination and extrusion lamination processing conditions.

Description

technical field [0001] The present invention relates to a heat-sealable functional stretch film, in particular to a polymer film with a heat-sealing strength ≥ 3N / 15mm and a thickness in the range of ≥ 0.010 and ≤ 0.150 mm, which is composed of a single layer or two layers or more than two layers. Olefin resin assisted blending process, heat-sealable unidirectional or biaxial stretching film obtained by blow molding or cast extrusion stretching or co-extrusion stretching process. This packaging material can be widely used in food, daily necessities, cosmetics, chemical products, pesticides, military industry, pharmaceutical products bags and self-filling sealed packaging, gravure, flexographic printing film bags and self-filling sealed packaging, especially suitable for Application of various heat-sealing materials under dry compounding, wet compounding and extrusion compounding processing conditions. Background technique [0002] With the continuous emergence of new polyme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08L23/06C08L23/08C08L23/12C08L23/14B32B27/32B65D65/38B65D65/40
Inventor 夏嘉良高学文
Owner 江苏彩华包装集团公司
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